Re: [PATCH] arm64: dts: qcom: sc8280xp: Flatten usb controller nodes

[Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>]

On 7/1/26 6:12 PM, Konrad Dybcio wrote:
> On 7/1/26 6:04 PM, Xilin Wu wrote:
>> On 7/1/2026 11:10 PM, Konrad Dybcio wrote:
>>> On 5/7/26 4:29 PM, Xilin Wu wrote:
>>>> Flatten usb controller nodes and update to using latest bindings
>>>> and flattened driver approach.
>>>>
>>>> Signed-off-by: Xilin Wu <sophon@radxa.com>
>>>> ---
>>>
>>> I tested this on a CRD and an x13s, both work fine across suspend.
>>>
>>> Turned out in my local experiments I made a typo in the name of the
>>> interrupt that was carried over to the big node..
>>>
>>> Reviewed-by: Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>
>>> Tested-by: Konrad Dybcio <konrad.dybcio@oss.qualcomm.com> # X13s, CRD8280
>>>
>>> Konrad
>>>
>>
>> Unfortunately as I mentioned on IRC [1], this actually causes random NoC timeout on reboot, which seems to be related to pcie.
>>
>> [1] https://oftc.catirclogs.org/linux-msm/2026-06-11#35405057;
> 
> Ah, you mentioned this:
> 
> https://gist.github.com/strongtz/50bbd71a9f41d0d1aa9849b8cf1dce21
> 
> This is an attempt to read CONFIG_SPACE+0x0.. I don't really know..

Could you try adding something like this

diff --git a/drivers/pci/access.c b/drivers/pci/access.c
index b123da16b63b..5e08cb239e78 100644
--- a/drivers/pci/access.c
+++ b/drivers/pci/access.c
@@ -43,6 +43,7 @@ int noinline pci_bus_read_config_##size \
        if (PCI_##size##_BAD)                                           \
                return PCIBIOS_BAD_REGISTER_NUMBER;                     \
                                                                        \
+       dev_err(&bus->dev, "Reading configspace+0x%x as %s\n", pos, #size); \
        pci_lock_config(flags);                                         \
        res = bus->ops->read(bus, devfn, pos, len, &data);              \
        if (res)                                                        

(perhaps with a WARN_ON(1) to get a stack trace and only print for the
crashing reg)?

FWIW I can't repro on a CRD8280

Konrad